Cooking equipment power control method and device, cooking equipment and induction cooker

Abstract

The invention relates to a cooking equipment power control method and device, cooking equipment and an induction cooker. The method comprises the steps that target power is acquired; acquiring corresponding reference power according to the target power; adjusting the actual PPG value of the cooking equipment to enable the cooking equipment to work at the reference power; obtaining a target packet loss rate according to the reference power and the target power; and adjusting the actual packet loss rate of the reference power to be the target packet loss rate, so that the cooking equipment works at the target power. The low-power continuous heating stability of the cooking equipment can be improved.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and in particular to a cooking equipment power control method, device, cooking equipment and an induction cooker. Background Art

[0002] With the increasing popularity of electric cooking equipment, the power requirements for induction cookers are becoming more diverse.

[0003] The power control solution of traditional induction cookers is relatively mature for high power above 1000W, but the current sampling accuracy is insufficient in the low power range of 100W-500W, and the ability to resist temperature drift is also relatively weak.

[0004] When realizing low-power continuous heating of the induction cooker, the cost of optimizing the current sampling hardware solution has to be increased to meet the current sampling of lower power. The patent of this invention effectively solves the problem of constant power control of low power through software algorithm without increasing the hardware cost. And it can meet the constant power control of the induction cooker under different pots and different grid voltage input conditions. Summary of the invention

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a cooking device power control method, device, cooking device and induction cooker.

[0006] In a first aspect, the present invention provides a cooking device power control method, the method comprising:

[0007] Get target power;

[0008] Acquire a corresponding reference power according to the target power;

[0009] adjusting an actual PPG value of a cooking device so that the cooking device operates at the reference power;

[0010] Obtaining a target packet loss rate according to the reference power and the target power;

[0011] The actual packet loss rate of the reference power is adjusted to the target packet loss rate, so that the cooking device works at the target power.

[0012] Optionally, adjusting the actual PPG value of the cooking device so that the cooking device works at the reference power includes:

[0013] According to the reference power, obtaining a reference PPG value corresponding to the reference power;

[0014] causing the cooking device to operate according to the reference PPG value;

[0015] Obtaining the actual power of the cooking device when working according to the reference PPG value;

[0016] Determining whether the actual power is equal to the reference power;

[0017] If the actual power is not equal to the reference power, the actual PPG value of the cooking device is adjusted until the actual power is equal to the reference power.

[0018] Optionally, if the actual power is not equal to the reference power, adjusting the actual PPG value of the cooking device includes:

[0019] If the actual power is greater than the reference power, reducing the actual PPG value;

[0020] If the actual power is less than the reference power, the actual PPG value is increased.

[0021] Optionally, the method further includes:

[0022] When the actual power is equal to the reference power, obtaining a corresponding actual PPG value;

[0023] The corresponding actual PPG value is used as the reference PPG value corresponding to the reference power.

[0024] Optionally, the target packet loss rate is obtained according to the reference power and the target power in the following manner:

[0025]

[0026] Among them, A is the target packet loss rate, P 目 is the target power, P 基 is the reference power.

[0027] Optionally, the adjusting the actual packet loss rate of the reference power to the target packet loss rate includes:

[0028] Obtaining the duration of each working cycle according to the reference power and / or the target power;

[0029] According to the duration of each working cycle and the target packet loss rate, obtaining the on duration and the off duration in each working cycle;

[0030] The cooking device is made to work for the on time period and then stop working for the off time period in each working cycle.

[0031] Optionally, the on duration and off duration in each working cycle are obtained according to the duration of each working cycle and the target packet loss rate, in the following manner:

[0032] T1=T*(1-A)

[0033] T2=T*A

[0034] Among them, T1 is the on time, T2 is the off time, T is the duration of each working cycle, and A is the target packet loss rate.

[0035] In a second aspect, a cooking equipment power control device is provided, the device comprising:

[0036] A power acquisition unit, used for acquiring target power;

[0037] The power acquisition unit is further used to acquire the corresponding reference power according to the target power;

[0038] a pulse width modulation unit, used for adjusting an actual PPG value of the cooking device so that the cooking device works at the reference power;

[0039] A controller, configured to obtain a target packet loss rate according to the reference power and the target power;

[0040] The controller is further configured to adjust the actual packet loss rate of the reference power to the target packet loss rate, so that the cooking device operates at the target power.

[0041] In a third aspect, a cooking device is provided, using any of the methods described above.

[0042] In a fourth aspect, an induction cooker is provided, using the method described in any one of the above items.

[0043] The present invention provides a cooking equipment power control method, device, cooking equipment and induction cooker, the method comprising: obtaining a target power; obtaining a corresponding reference power according to the target power; adjusting the actual PPG value of the cooking equipment so that the cooking equipment works at the reference power; obtaining a target packet loss rate according to the reference power and the target power; adjusting the actual packet loss rate of the reference power to the target packet loss rate so that the cooking equipment works at the target power. In the embodiment of the present invention, a reference power is set, and the reference power is greater than the target power, so that the detection of small currents during operation with the reference power is more accurate, the stability control of the reference power is better, and the target power operation is achieved in the form of wave loss on the basis of the reference power with better stability, and the stability will be better. Therefore, the method of the embodiment of the present invention can improve the stability of low-power continuous heating of the cooking equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0046] Figure 1 This is an application environment diagram of the cooking equipment power control method according to an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of a cooking device power control method according to an embodiment of the present invention;

[0048] Figure 3 It is a schematic diagram of PPG value;

[0049] Figure 4 A schematic diagram of a working cycle in a cooking device power control method according to an embodiment of the present invention;

[0050] Figure 5 4 is a structural block diagram of a cooking equipment power control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Figure 1 FIG. 1 is an application environment diagram of a cooking device power control method in an embodiment. Figure 1 , the cooking device power control method is applied to cooking equipment. Figure 1 The cooking device shown is an induction cooker. The cooking device used in the embodiment of the present invention may be an induction cooker, an induction heating rice cooker, or other cooking devices that use induction as energy.

[0053] Figure 2 FIG. 1 is a flow chart of a cooking device power control method according to an embodiment of the present invention. Figure 2 As shown, the method includes:

[0054] Step 210, obtaining target power;

[0055] Step 220, obtaining a corresponding reference power according to the target power;

[0056] Step 230, adjusting the actual PPG value of the cooking device so that the cooking device works at the reference power;

[0057] Step 240, obtaining a target packet loss rate according to the reference power and the target power;

[0058] Step 250: Adjust the actual packet loss rate of the reference power to the target packet loss rate, so that the cooking device works at the target power.

[0059] In the embodiment of the present invention, the target power is a smaller power than the maximum power of the cooking device. For example, if the maximum power of the cooking device is 2000W, the target power may be 600W, 900W, etc.

[0060] PPG is a programmable pulse generator in the electromagnetic cooking device. The PPG value is the pulse width of the programmable pulse generator. The power of the cooking device can be adjusted by adjusting the PPG value.

[0061] Figure 3 Shown is a schematic diagram of PPG value, such as Figure 3 As shown, the PPG value can generally be considered as a half-sine wave. The PPG value is related to the output power / working power of the cooking device. Increasing the PPG value can increase the output power / working power of the cooking device.

[0062] Electromagnetic cooking equipment usually runs at maximum power for a longer period of time, and runs at lower power for a shorter period of time. Therefore, in the prior art, in view of the working characteristics of electromagnetic cooking equipment, the circuit has the highest stability when running at maximum power. In order to improve the stability of the cooking equipment when running at maximum power, other circuits in the cooking equipment are designed to support maximum power operation, such as sampling circuits. When the cooking equipment is running near the maximum power, the circuit operates with a larger current, and when it is running at a reduced power, the current in the circuit is smaller. The sampling circuit in the cooking equipment has a higher accuracy for sampling large currents, but a lower accuracy for sampling small currents. This makes it difficult to accurately detect the working current when the cooking equipment is running at low power due to the low accuracy of the sampling circuit's small current sampling, making it difficult to achieve stability in low-power operation.

[0063] In the embodiment of the present invention, a reference power is set, and the reference power is greater than the target power, so that the detection of the small current when the reference power is running is more accurate, the stability of the reference power is better controlled, and the target power operation is achieved in the form of wave dropping based on the reference power with better stability, and the stability will be better. Therefore, the method of the embodiment of the present invention can improve the stability of low-power continuous heating of the cooking device.

[0064] In the embodiment of the present invention, in step 230, adjusting the actual PPG value of the cooking device so that the cooking device works at the reference power includes:

[0065] According to the reference power, obtaining a reference PPG value corresponding to the reference power;

[0066] causing the cooking device to operate according to the reference PPG value;

[0067] Obtaining the actual power of the cooking device when working according to the reference PPG value;

[0068] Determining whether the actual power is equal to the reference power;

[0069] If the actual power is not equal to the reference power, the actual PPG value of the cooking device is adjusted until the actual power is equal to the reference power.

[0070] In the embodiment of the present invention, the reference power is controlled in a feedback form. Although the reference power is less than the maximum power, it is not a small power either. Therefore, the stability of the control of the reference power is also good.

[0071] In the embodiment of the present invention, the reference powers corresponding to different target powers may be the same or different. In one embodiment of the present invention, the maximum power is 2000W, and the reference powers corresponding to different target powers may be uniformly set to 1200W.

[0072] In another embodiment of the present invention, when the maximum power is 2000W and the target power is less than 1000W and greater than 500W, the reference power is set to 1200W; when the target power is less than 500W, the reference power may be 900W.

[0073] Different cooking equipment has different maximum power and target power, and the setting of the baseline power may also be different, which will not be elaborated here.

[0074] In the embodiment of the present invention, if the actual power is not equal to the reference power, adjusting the actual PPG value of the cooking device includes:

[0075] If the actual power is greater than the reference power, reducing the actual PPG value;

[0076] If the actual power is less than the reference power, the actual PPG value is increased.

[0077] In an embodiment of the present invention, the method further includes:

[0078] When the actual power is equal to the reference power, obtaining a corresponding actual PPG value;

[0079] The corresponding actual PPG value is used as the reference PPG value corresponding to the reference power.

[0080] In the embodiment of the present invention, in step 240, the target packet loss rate is obtained according to the reference power and the target power in the following manner:

[0081]

[0082] Among them, A is the target packet loss rate, P 目 is the target power, P 基 is the reference power.

[0083] In the embodiment of the present invention, the actual packet loss rate of adjusting the reference power to the target packet loss rate includes:

[0084] Obtaining the duration of each working cycle according to the reference power and / or the target power;

[0085] According to the duration of each working cycle and the target packet loss rate, obtaining the on duration and the off duration in each working cycle;

[0086] The cooking device is made to work for the on time period and then stop working for the off time period in each working cycle.

[0087] In the embodiment of the present invention, the on duration and off duration in each working cycle are obtained according to the duration of each working cycle and the target packet loss rate, in the following manner:

[0088] T1=T*(1-A)

[0089] T2=T*A

[0090] Among them, T1 is the on time, T2 is the off time, T is the duration of each working cycle, and A is the target packet loss rate.

[0091] In the embodiment of the present invention, the duration of each working cycle can be preset, or can be adjusted according to the target power and the reference power. A working cycle can usually be 80 milliseconds.

[0092] In one embodiment of the present invention, the maximum power of the cooking device is 2000W, the target power is 900W, and the reference power can be 1200W. After adjusting the PPG value to the reference PPG value, the cooking device is operated at power, and current sampling is performed at this time and converted into actual power. If the actual power is greater than 1200W, the PPG value can be reduced. Similarly, if the actual power is less than 1200W, the PPG value is increased. After adjustment, the cooking device can be stably operated at 1200W.

[0093] The calculated target packet loss rate is 0.25, and one working cycle is 80 milliseconds. In one working cycle, the cooking device works for 60 milliseconds and stops for 20 milliseconds. Figure 4 The diagram is a schematic diagram of the operation of the cooking device according to the embodiment of the present invention. In terms of multiple cycles, the cooking device operates alternately by working for 60 milliseconds, stopping for 20 milliseconds, and working for 60 milliseconds. Figure 4 In the example, a half-sine wave is used to indicate operation, and a straight line is used to indicate packet loss and stop working. At this time, the total power of the cooking equipment is 900W.

[0094] The method of the embodiment of the present invention can enable the cooking device to operate stably at a relatively low power, and can improve the low-power stability of the cooking device.

[0095] Figure 5 FIG. 1 is a structural block diagram of a cooking equipment power control device according to an embodiment of the present invention. Figure 5 As shown, the device comprises:

[0096] A power acquisition unit 510, configured to acquire a target power;

[0097] The power acquisition unit 510 is further configured to acquire a corresponding reference power according to the target power;

[0098] A pulse width adjustment unit 520, configured to adjust an actual PPG value of the cooking device so that the cooking device operates at the reference power;

[0099] A controller 530, configured to obtain a target packet loss rate according to the reference power and the target power;

[0100] The controller 530 is further configured to adjust the actual packet loss rate of the reference power to the target packet loss rate, so that the cooking device works at the target power.

[0101] In the embodiment of the present invention, the pulse width modulation unit 520 is further used for:

[0102] According to the reference power, obtaining a reference PPG value corresponding to the reference power;

[0103] causing the cooking device to operate according to the reference PPG value;

[0104] The device also includes a detection unit for obtaining the actual power of the cooking device when it works according to the reference PPG value;

[0105] The controller 530 in the device is also used to determine whether the actual power is equal to the reference power;

[0106] The pulse width modulation unit 520 is further configured to adjust the actual PPG value of the cooking device if the actual power is not equal to the reference power, until the actual power is equal to the reference power.

[0107] In the embodiment of the present invention, the pulse width modulation unit 520 is further used for:

[0108] If the actual power is greater than the reference power, reducing the actual PPG value;

[0109] If the actual power is less than the reference power, the actual PPG value is increased.

[0110] In the embodiment of the present invention, the controller 530 is further used for:

[0111] When the actual power is equal to the reference power, obtaining a corresponding actual PPG value;

[0112] The corresponding actual PPG value is used as the reference PPG value corresponding to the reference power.

[0113] In the embodiment of the present invention, the controller 530 is further used for:

[0114] Obtain a target packet loss rate according to the reference power and the target power in the following manner:

[0115]

[0116] Among them, A is the target packet loss rate, P 目 is the target power, P 基 is the reference power.

[0117] In the embodiment of the present invention, the controller 530 is further used for:

[0118] Obtaining the duration of each working cycle according to the reference power and / or the target power;

[0119] According to the duration of each working cycle and the target packet loss rate, obtaining the on duration and the off duration in each working cycle;

[0120] The cooking device is made to work for the on time period and then stop working for the off time period in each working cycle.

[0121] In the embodiment of the present invention, the controller 530 is further used for:

[0122] According to the duration of each working cycle and the target packet loss rate, the on duration and the off duration in each working cycle are obtained in the following manner:

[0123] T1=T*(1-A)

[0124] T2=T*A

[0125] Among them, T1 is the on time, T2 is the off time, T is the duration of each working cycle, and A is the target packet loss rate.

[0126] The embodiment of the present invention further provides a cooking device, which uses the above method.

[0127] An embodiment of the present invention further provides an induction cooker, using the method described above.

[0128] The method and device of the embodiment of the present invention can enable the cooking device to operate stably at a relatively low power, and can improve the low-power stability of the cooking device.

[0129] The cooking device and the induction cooker according to the embodiments of the present invention can operate stably at relatively low power and have good low-power stability.

[0130] Figure 2 FIG. 1 is a flow chart of a cooking device power control method in one embodiment. It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0131] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0132] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0133] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A cooking equipment power control method, characterized in that: The method comprises: Get target power; Acquire a corresponding reference power according to the target power; adjusting an actual PPG value of a cooking device so that the cooking device operates at the reference power; Obtaining a target packet loss rate according to the reference power and the target power; The actual packet loss rate of the reference power is adjusted to the target packet loss rate, so that the cooking device works at the target power.

2. The method according to claim 1, characterized in that The step of adjusting the actual PPG value of the cooking device so that the cooking device works at the reference power includes: According to the reference power, obtaining a reference PPG value corresponding to the reference power; causing the cooking device to operate according to the reference PPG value; Obtaining the actual power of the cooking device when working according to the reference PPG value; Determining whether the actual power is equal to the reference power; If the actual power is not equal to the reference power, the actual PPG value of the cooking device is adjusted until the actual power is equal to the reference power.

3. The method according to claim 2, characterized in that If the actual power is not equal to the reference power, adjusting the actual PPG value of the cooking device comprises: If the actual power is greater than the reference power, reducing the actual PPG value; If the actual power is less than the reference power, the actual PPG value is increased.

4. The method according to claim 2, characterized in that: The method further comprises: When the actual power is equal to the reference power, obtaining a corresponding actual PPG value; The corresponding actual PPG value is used as the reference PPG value corresponding to the reference power.

5. The method according to claim 2, characterized in that: The target packet loss rate is obtained according to the reference power and the target power in the following manner: Among them, A is the target packet loss rate, P 目 is the target power, P 基 is the reference power.

6. The method according to claim 1, characterized in that The adjusting the actual packet loss rate of the reference power to the target packet loss rate comprises: Obtaining the duration of each working cycle according to the reference power and / or the target power; According to the duration of each working cycle and the target packet loss rate, obtaining the on duration and the off duration in each working cycle; The cooking device is made to work for the on time period and then stop working for the off time period in each working cycle.

7. The method according to claim 6, characterized in that The on duration and off duration of each working cycle are obtained according to the duration of each working cycle and the target packet loss rate, in the following manner: T1=T*(1-A) T2=T*A Among them, T1 is the on time, T2 is the off time, T is the duration of each working cycle, and A is the target packet loss rate.

8. A cooking equipment power control device, characterized in that: The device comprises: A power acquisition unit, used for acquiring target power; The power acquisition unit is further used to acquire the corresponding reference power according to the target power; a pulse width modulation unit, used for adjusting an actual PPG value of the cooking device so that the cooking device works at the reference power; A controller, configured to obtain a target packet loss rate according to the reference power and the target power; The controller is further configured to adjust the actual packet loss rate of the reference power to the target packet loss rate, so that the cooking device operates at the target power.

9. A cooking device, characterized in that: Apply the method as described in any one of 1 to 7.

10. An induction cooker, characterized in that: Apply the method as described in any one of 1 to 7.

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